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<li class="chapter"> <a href="stream-ngx_stream_core_module.html" title="ngx_stream_core_module"> ngx_stream_core_module </a> </li>
<li class="chapter"> <a href="stream-ngx_stream_access_module.html" title="ngx_stream_access_module"> ngx_stream_access_module </a> </li>
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<h1>Module ngx_stream_zone_sync_module</h1>
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<div><ul>
<li><a href="#example">Example Configuration</a></li>
<li><a href="#directives">Directives</a>
<ul>
<li><a href="#zone_sync">zone_sync</a></li>
<li><a href="#zone_sync_buffers">zone_sync_buffers</a></li>
<li><a href="#zone_sync_connect_retry_interval">zone_sync_connect_retry_interval</a></li>
<li><a href="#zone_sync_connect_timeout">zone_sync_connect_timeout</a></li>
<li><a href="#zone_sync_interval">zone_sync_interval</a></li>
<li><a href="#zone_sync_recv_buffer_size">zone_sync_recv_buffer_size</a></li>
<li><a href="#zone_sync_server">zone_sync_server</a></li>
<li><a href="#zone_sync_ssl">zone_sync_ssl</a></li>
<li><a href="#zone_sync_ssl_certificate">zone_sync_ssl_certificate</a></li>
<li><a href="#zone_sync_ssl_certificate_key">zone_sync_ssl_certificate_key</a></li>
<li><a href="#zone_sync_ssl_ciphers">zone_sync_ssl_ciphers</a></li>
<li><a href="#zone_sync_ssl_crl">zone_sync_ssl_crl</a></li>
<li><a href="#zone_sync_ssl_name">zone_sync_ssl_name</a></li>
<li><a href="#zone_sync_ssl_password_file">zone_sync_ssl_password_file</a></li>
<li><a href="#zone_sync_ssl_protocols">zone_sync_ssl_protocols</a></li>
<li><a href="#zone_sync_ssl_server_name">zone_sync_ssl_server_name</a></li>
<li><a href="#zone_sync_ssl_trusted_certificate">zone_sync_ssl_trusted_certificate</a></li>
<li><a href="#zone_sync_ssl_verify">zone_sync_ssl_verify</a></li>
<li><a href="#zone_sync_ssl_verify_depth">zone_sync_ssl_verify_depth</a></li>
<li><a href="#zone_sync_timeout">zone_sync_timeout</a></li>
</ul>
</li>
<li><a href="#stream_zone_sync_status">API endpoints</a></li>
<li><a href="#controlling_cluster_node">启动，停止，删除集群节点</a><br><a href="" id="summary"></a></li>
</ul>
<p><code>ngx_stream_zone_sync_module</code>模块(1.13.8)为在群集的节点之间同步<a href="stream-ngx_stream_upstream_module.html#zone">共享存储区</a>的内容提供了必要的支持。要为特定区域启用同步，相应的模块必须支持此功能。当前，可以同步 HTTP <a href="http-ngx_http_upstream_module.html#sticky">sticky</a>会话，有关<a href="http-ngx_http_limit_req_module.html">过多的 HTTP 请求</a>的信息以及<a href="http-ngx_http_keyval_module.html">http</a>和<a href="stream-ngx_stream_keyval_module.html">stream</a>中的键值对。</p>
<div class="alert callout info"><p class="title"><i class="fa fa-info-circle"></i>Note</p><div><p>此模块可作为<a href="javascript:window.open('https://nginx.com/products/');" target="_blank" rel="noopener noreferrer">commercial subscription</a>的一部分使用。</p>
</div></div>
<p><a href="" id="example"></a></p>
<h4 id="example-configuration"><a href="#example-configuration" id="example-configuration"></a>Example Configuration</h4>
<p>Minimal configuration:</p>
<pre><code class="hljs language-shell">http {
    ...

    upstream backend {
       server backend1.example.com:8080;
       server backend2.example.com:8081;

       sticky learn
              create=$upstream_cookie_examplecookie
              lookup=$cookie_examplecookie
              zone=client_sessions:1m sync;
    }

    ...
}

stream {
    ...

    server {
        zone_sync;

        listen 127.0.0.1:12345;

        # cluster of 2 nodes
        zone_sync_server a.example.com:12345;
        zone_sync_server b.example.com:12345;

    }
</code></pre>
<p>启用 SSL 并由 DNS 定义群集成员的更复杂的配置：</p>
<pre><code class="hljs language-shell">...

stream {
    ...

    resolver 127.0.0.1 valid=10s;

    server {
        zone_sync;

        # the name resolves to multiple addresses that correspond to cluster nodes
        zone_sync_server cluster.example.com:12345 resolve;

        listen 127.0.0.1:4433 ssl;

        ssl_certificate     localhost.crt;
        ssl_certificate_key localhost.key;

        zone_sync_ssl on;

        zone_sync_ssl_certificate     localhost.crt;
        zone_sync_ssl_certificate_key localhost.key;
    }
}
</code></pre>
<p><a href="" id="directives"></a></p>
<h4 id="directives"><a href="#directives" id="directives"></a>Directives</h4>
<p><a href="" id="zone_sync"></a></p>
<table>
<thead></thead>
<tbody>
<tr><td>Syntax:</td><td><code>zone_sync;</code></td></tr>
<tr><td>Default:</td><td>—</td></tr>
<tr><td>Context:</td><td><code>server</code></td></tr>
</tbody>
</table>
<p>启用群集节点之间共享内存区域的同步。群集节点是使用<a href="#zone_sync_server">zone_sync_server</a>指令定义的。</p>
<p><a href="" id="zone_sync_buffers"></a></p>
<table>
<thead></thead>
<tbody>
<tr><td>Syntax:</td><td><code>zone_sync_buffers number size;</code></td></tr>
<tr><td>Default:</td><td><code>zone_sync_buffers 8 4k|8k;</code></td></tr>
<tr><td>Context:</td><td><code>stream</code> , <code>server</code></td></tr>
</tbody>
</table>
<p>设置用于推送区域内容的每个区域缓冲区的<code>number</code>和<code>size</code>。默认情况下，缓冲区大小等于一个内存页。根据平台的不同，它可以是 4K 或 8K。</p>
<div class="alert callout info"><p class="title"><i class="fa fa-info-circle"></i>Note</p><div><p>单个缓冲区必须足够大以容纳要同步的每个区域的任何条目。</p>
</div></div>
<p><a href="" id="zone_sync_connect_retry_interval"></a></p>
<table>
<thead></thead>
<tbody>
<tr><td>Syntax:</td><td><code>zone_sync_connect_retry_interval time;</code></td></tr>
<tr><td>Default:</td><td><code>zone_sync_connect_retry_interval 1s;</code></td></tr>
<tr><td>Context:</td><td><code>stream</code> , <code>server</code></td></tr>
</tbody>
</table>
<p>定义到另一个群集节点的连接尝试之间的间隔。</p>
<p><a href="" id="zone_sync_connect_timeout"></a></p>
<table>
<thead></thead>
<tbody>
<tr><td>Syntax:</td><td><code>zone_sync_connect_timeout time;</code></td></tr>
<tr><td>Default:</td><td><code>zone_sync_connect_timeout 5s;</code></td></tr>
<tr><td>Context:</td><td><code>stream</code> , <code>server</code></td></tr>
</tbody>
</table>
<p>定义用于与另一个群集节点构建连接的超时。</p>
<p><a href="" id="zone_sync_interval"></a></p>
<table>
<thead></thead>
<tbody>
<tr><td>Syntax:</td><td><code>zone_sync_interval time;</code></td></tr>
<tr><td>Default:</td><td><code>zone_sync_interval 1s;</code></td></tr>
<tr><td>Context:</td><td><code>stream</code> , <code>server</code></td></tr>
</tbody>
</table>
<p>定义轮询共享内存区域中更新的时间间隔。</p>
<p><a href="" id="zone_sync_recv_buffer_size"></a></p>
<table>
<thead></thead>
<tbody>
<tr><td>Syntax:</td><td><code>zone_sync_recv_buffer_size size;</code></td></tr>
<tr><td>Default:</td><td><code>zone_sync_recv_buffer_size 4k|8k;</code></td></tr>
<tr><td>Context:</td><td><code>stream</code> , <code>server</code></td></tr>
</tbody>
</table>
<p>设置每个连接的接收缓冲区的<code>size</code>，该缓冲区用于解析同步消息的传入流。缓冲区大小必须等于或大于<a href="#zone_sync_buffers">zone_sync_buffers</a>之一。默认情况下，缓冲区大小等于<a href="#zone_sync_buffers">zone_sync_buffers</a> <code>size</code>乘以<code>number</code>。</p>
<p><a href="" id="zone_sync_server"></a></p>
<table>
<thead></thead>
<tbody>
<tr><td>Syntax:</td><td><code>zone_sync_server address [resolve];</code></td></tr>
<tr><td>Default:</td><td>—</td></tr>
<tr><td>Context:</td><td><code>server</code></td></tr>
</tbody>
</table>
<p>定义集群节点的<code>address</code>。该地址可以指定为带有必需端口的域名或 IP 地址，也可以指定为在“ <code>unix:</code>”前缀之后指定的 UNIX 域套接字路径。解析为多个 IP 地址的域名一次定义了多个节点。</p>
<p><a href="" id="resolve"></a></p>
<p><code>resolve</code>参数指示 nginx 监视与该节点的域名对应的 IP 地址的更改，并自动修改配置，而无需重新启动 nginx。</p>
<p>群集节点既可以动态指定为带有<code>resolve</code>参数的单个<code>zone_sync_server</code>指令，也可以静态指定为一系列不带参数的多个指令的序列。</p>
<div class="alert callout info"><p class="title"><i class="fa fa-info-circle"></i>Note</p><div><p>每个群集节点仅应指定一次。</p>
</div></div><div class="alert callout info"><p class="title"><i class="fa fa-info-circle"></i>Note</p><div><p>所有群集节点应使用相同的配置。</p>
</div></div>
<p>为了使<code>resolve</code>参数起作用，必须在<a href="stream-ngx_stream_core_module.html#resolver">stream</a>块中指定<a href="stream-ngx_stream_core_module.html#stream">resolver</a>指令。例：</p>
<pre><code class="hljs language-shell">stream {
    resolver 10.0.0.1;

    server {
        zone_sync;
        zone_sync_server cluster.example.com:12345 resolve;
        ...
    }
}
</code></pre>
<p><a href="" id="zone_sync_ssl"></a></p>
<table>
<thead></thead>
<tbody>
<tr><td>Syntax:</td><td><code>zone_sync_ssl on | off;</code></td></tr>
<tr><td>Default:</td><td><code>zone_sync_ssl off;</code></td></tr>
<tr><td>Context:</td><td><code>stream</code> , <code>server</code></td></tr>
</tbody>
</table>
<p>启用 SSL/TLS 协议以连接到另一个群集服务器。</p>
<p><a href="" id="zone_sync_ssl_certificate"></a></p>
<table>
<thead></thead>
<tbody>
<tr><td>Syntax:</td><td><code>zone_sync_ssl_certificate file;</code></td></tr>
<tr><td>Default:</td><td>—</td></tr>
<tr><td>Context:</td><td><code>stream</code> , <code>server</code></td></tr>
</tbody>
</table>
<p>使用用于对另一台群集服务器进行身份验证的 PEM 格式的证书指定一个<code>file</code>。</p>
<p><a href="" id="zone_sync_ssl_certificate_key"></a></p>
<table>
<thead></thead>
<tbody>
<tr><td>Syntax:</td><td><code>zone_sync_ssl_certificate_key file;</code></td></tr>
<tr><td>Default:</td><td>—</td></tr>
<tr><td>Context:</td><td><code>stream</code> , <code>server</code></td></tr>
</tbody>
</table>
<p>使用 PEM 格式的密钥指定一个<code>file</code>，用于对另一台群集服务器进行身份验证。</p>
<p><a href="" id="zone_sync_ssl_ciphers"></a></p>
<table>
<thead></thead>
<tbody>
<tr><td>Syntax:</td><td><code>zone_sync_ssl_ciphers ciphers;</code></td></tr>
<tr><td>Default:</td><td><code>zone_sync_ssl_ciphers DEFAULT;</code></td></tr>
<tr><td>Context:</td><td><code>stream</code> , <code>server</code></td></tr>
</tbody>
</table>
<p>指定用于连接到另一个群集服务器的启用密码。密码以 OpenSSL 库可以理解的格式指定。</p>
<p>可以使用“ <code>openssl ciphers</code>”命令查看完整列表。</p>
<p><a href="" id="zone_sync_ssl_crl"></a></p>
<table>
<thead></thead>
<tbody>
<tr><td>Syntax:</td><td><code>zone_sync_ssl_crl file;</code></td></tr>
<tr><td>Default:</td><td>—</td></tr>
<tr><td>Context:</td><td><code>stream</code> , <code>server</code></td></tr>
</tbody>
</table>
<p>指定带有<code>file</code>的 PEM 格式的吊销证书(CRL)，用于<a href="#zone_sync_ssl_verify">verify</a>另一台群集服务器的证书。</p>
<p><a href="" id="zone_sync_ssl_name"></a></p>
<table>
<thead></thead>
<tbody>
<tr><td>Syntax:</td><td><code>zone_sync_ssl_name name;</code></td></tr>
<tr><td>Default:</td><td><code>zone_sync_ssl_name host from zone_sync_server;</code></td></tr>
<tr><td>Context:</td><td><code>stream</code> , <code>server</code></td></tr>
</tbody>
</table>
<p>该指令出现在 1.15.7 版中。</p>
<p>与群集服务器构建连接时，允许覆盖用于<a href="#zone_sync_ssl_verify">verify</a>群集服务器的证书和<a href="#zone_sync_ssl_server_name">通过 SNI</a>的服务器名称。</p>
<p>默认情况下，使用<a href="#zone_sync_server">zone_sync_server</a>地址的主机部分，如果指定了<a href="#resolve">resolve</a>参数，则使用解析的 IP 地址。</p>
<p><a href="" id="zone_sync_ssl_password_file"></a></p>
<table>
<thead></thead>
<tbody>
<tr><td>Syntax:</td><td><code>zone_sync_ssl_password_file file;</code></td></tr>
<tr><td>Default:</td><td>—</td></tr>
<tr><td>Context:</td><td><code>stream</code> , <code>server</code></td></tr>
</tbody>
</table>
<p>指定一个带有<a href="#zone_sync_ssl_certificate_key">secret keys</a>密码短语的<code>file</code>，其中每个密码短语都在单独的行上指定。加载密钥时依次尝试使用密码短语。</p>
<p><a href="" id="zone_sync_ssl_protocols"></a></p>
<table>
<thead></thead>
<tbody>
<tr><td>Syntax:</td><td><code>zone_sync_ssl_protocols [SSLv2] [SSLv3] [TLSv1] [TLSv1.1] [TLSv1.2] [TLSv1.3];</code></td></tr>
<tr><td>Default:</td><td><code>zone_sync_ssl_protocols TLSv1 TLSv1.1 TLSv1.2;</code></td></tr>
<tr><td>Context:</td><td><code>stream</code> , <code>server</code></td></tr>
</tbody>
</table>
<p>启用指定的协议以连接到另一个群集服务器。</p>
<p><a href="" id="zone_sync_ssl_server_name"></a></p>
<table>
<thead></thead>
<tbody>
<tr><td>Syntax:</td><td><code>zone_sync_ssl_server_name on | off;</code></td></tr>
<tr><td>Default:</td><td><code>zone_sync_ssl_server_name off;</code></td></tr>
<tr><td>Context:</td><td><code>stream</code> , <code>server</code></td></tr>
</tbody>
</table>
<p>该指令出现在 1.15.7 版中。</p>
<p>与其他群集服务器构建连接时，启用或禁用通过<a href="javascript:window.open('https://en.wikipedia.org/wiki/Server_Name_Indication');" target="_blank" rel="noopener noreferrer">TLS 服务器名称指示扩展</a>(SNI，RFC 6066)进行服务器名传递。</p>
<p><a href="" id="zone_sync_ssl_trusted_certificate"></a></p>
<table>
<thead></thead>
<tbody>
<tr><td>Syntax:</td><td><code>zone_sync_ssl_trusted_certificate file;</code></td></tr>
<tr><td>Default:</td><td>—</td></tr>
<tr><td>Context:</td><td><code>stream</code> , <code>server</code></td></tr>
</tbody>
</table>
<p>指定带有<code>file</code>的 PEM 格式的受信任 CA 证书，该证书用于<a href="#zone_sync_ssl_verify">verify</a>其他群集服务器的证书。</p>
<p><a href="" id="zone_sync_ssl_verify"></a></p>
<table>
<thead></thead>
<tbody>
<tr><td>Syntax:</td><td><code>zone_sync_ssl_verify on | off;</code></td></tr>
<tr><td>Default:</td><td><code>zone_sync_ssl_verify off;</code></td></tr>
<tr><td>Context:</td><td><code>stream</code> , <code>server</code></td></tr>
</tbody>
</table>
<p>启用或禁用对另一个群集服务器证书的验证。</p>
<p><a href="" id="zone_sync_ssl_verify_depth"></a></p>
<table>
<thead></thead>
<tbody>
<tr><td>Syntax:</td><td><code>zone_sync_ssl_verify_depth number;</code></td></tr>
<tr><td>Default:</td><td><code>zone_sync_ssl_verify_depth 1;</code></td></tr>
<tr><td>Context:</td><td><code>stream</code> , <code>server</code></td></tr>
</tbody>
</table>
<p>在另一个群集服务器证书链中设置验证深度。</p>
<p><a href="" id="zone_sync_timeout"></a></p>
<table>
<thead></thead>
<tbody>
<tr><td>Syntax:</td><td><code>zone_sync_timeout timeout;</code></td></tr>
<tr><td>Default:</td><td><code>zone_sync_timeout 5s;</code></td></tr>
<tr><td>Context:</td><td><code>stream</code> , <code>server</code></td></tr>
</tbody>
</table>
<p>在连接到另一个群集节点的两次连续读取或写入操作之间设置<code>timeout</code>。如果在此时间内没有数据传输，则连接将关闭。</p>
<p><a href="" id="stream_zone_sync_status"></a></p>
<h4 id="api-endpoints"><a href="#api-endpoints" id="api-endpoints"></a>API endpoints</h4>
<p>节点的同步状态可通过 API 的<a href="http-ngx_http_api_module.html#stream_zone_sync_">/stream/zone_sync/</a>端点获得，该端点返回<a href="http-ngx_http_api_module.html#def_nginx_stream_zone_sync">following</a>指标。</p>
<p><a href="" id="controlling_cluster_node"></a></p>
<h4 id="启动停止删除集群节点"><a href="#启动停止删除集群节点" id="启动停止删除集群节点"></a>启动，停止，删除集群节点</h4>
<p>要启动新节点，请使用新节点的 IP 地址更新群集主机名的 DNS 记录，然后启动实例。新节点将从 DNS 或静态配置中发现其他节点，并将开始向其发送更新。其他节点最终将使用 DNS 查找新节点，并开始向其推送更新。如果是静态配置，则需要重新加载其他节点才能将更新发送到新节点。</p>
<p>要停止节点，请向实例发送<code>QUIT</code>signal。该节点将完成区域同步并正常关闭打开的连接。</p>
<p>要删除节点，请更新群集主机名的 DNS 记录并删除该节点的 IP 地址。所有其他节点最终将发现该节点已删除，并关闭了与该节点的连接，并且不再尝试连接到该节点。删除节点后，可以如上所述将其停止。在静态配置的情况下，需要重新加载其他节点，以停止向已删除的节点发送更新。</p>
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